I claim the ornamental design for an aerodynamic performance enhancing semi-trailer component, as shown and described.
FIG. 1 of the drawings is a perspective view showing the front and right side of an aerodynamic performance enhancing semi-trailer component embodying the design of my invention;
FIG. 2 is a front elevation view of the component;
FIG. 3 is a right side elevation view;
FIG. 4 is a top view;
FIG. 5 is a left side elevation view;
FIG. 6 is a bottom view; and,
FIG. 7 is a back view.
In FIG. 1 of the drawings, the broken lines showing a portion of a semi-trailer form no part of the claimed design.